[TCML] Trying another coil after 42 years
billwashburn at comcast.net
Sun Oct 3 15:19:37 MDT 2010
Thanks John...I'll let you know what the waveforms, etc. look kike as I
I'm pretty slow as I've had some serious back and hip injuries. Well, I can
Stretch the build out (one of the things I love) and rest if need be.
From: John Forcina [mailto:forcijo10 at gmail.com]
Sent: Saturday, October 02, 2010 7:25 PM
To: Tesla Coil Mailing List
Subject: Re: [TCML] Trying another coil after 42 years
Go for it, i am sure it will work excellent!
On Sat, Oct 2, 2010 at 8:33 PM, Bill Washburn
<billwashburn at comcast.net>wrote:
> I have a couple of "FLPS - Power Supplies - for Cold-Cathode Lamps" and
> thought I'd use one of these with
> A one stage High-voltage amp to push the current up. In addition several
> stages of cocroft-Walton might push the
> Voltage up where it will need to be.
> The DigiKeyCXA-L10L runs at 4.5W, 900V and 30KHz..
> Could I start with one of these and/or amplify/multiply (or at 4.5W would
> simple voltage multiplication work)?
> Thanks, Bill
> -----Original Message-----
> From: G Hunter [mailto:dogbrain_39560 at yahoo.com]
> Sent: Saturday, October 02, 2010 8:15 AM
> To: Tesla Coil Mailing List
> Subject: Re: [TCML] Trying another coil after 42 years
> Hi Bill,
> Welcome back to the insanity...
> > When I was a youngster I built a small Tesla transformer
> > with an old Model-T
> > spark coil and a capacitor made of a piece o glass with
> > tin-foil electrodes.
> > The primary was two inches or so in diameter and the
> > secondary was one inch
> > or so at about six inches in height.
> > It performed well.
> Yeah, I made something similar when I was a teenager. Powered it with a
> ignition coil and a dimmer switch. Glass plate capacitor, machine bolt
> spark gap, 2-3" streamers and lots of purple corona. I was mesmerized.
> my parents known what I was up to, they probably would have stopped me.
> I've been tinkering with the hobby--on & off--roughly 35 years now.
> > I'd like to recreate this same coil but with a 555 timer
> > source or some
> > other small AC source.
> Are you trying to avoid 120vac operation for some reason? Also, I'm not
> sure how you'd work a timer chip into a TC. If you want to keep a small,
> table top coil simple & reliable, I suggest a car ignition coil & dimmer
> switch for the power supply, or better yet (much better) a small neon sign
> transformer or an oil burner ignition coil for the power supply.
> > The old glass and wooden stuff would go but the same
> > general size of 6" x 6"
> > would stay the same.
> Nothing wrong with glass plate caps for a small coil. Such caps are not
> very efficient, but if your goal is only a few inches of spark, they are
> good enough. Besides, they lend a cool "retro" look to a project. Of
> course, the "Gold standard" for Tesla coil tank caps these days is a bank
> small polypropylene & foil units arranged in series/parallel to achieve
> desired capacitance & voltage rating--the so-called "multi-mini cap".
> > Can you tell me (on the heavy side to allow for mistakes)
> > roughly what power
> > in watts at about 45KHz (or whatever frequency you would
> > recommend) would be
> > enough for a toy like this?
> You only need a few 10s of watts. Very small coils tend to have rather
> operating frequencies. 500-1500kHz is far more likely than 45kHz. The
> exact operating frequency is not at all critical. If you wish to
> uncertainty about such things, try using one of the Tesla coil design
> programs such as WinTesla or JavaTC:
> Programs like this will tell you virtually everything about your coil
> you even build it. To heck with the "good old days" of coiling from way
> back. Thanks in part to this list, the knowledge level is higher, the
> components & materials are better, and the resources for computer assisted
> design are just excellent. The good old days of coiling are right now!
> > Thanks so much, Bill Washburn
> Best Regards,
> Gregory R. Hunter
> Tesla mailing list
> Tesla at pupman.com
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